Hear hear!
I love horror classics, although I personally had the slasher genre broken up in my head as mainly serial killers, and some of the others you mentioned as 'supernatural' as a delineation (Pennywise and Candyman, for example, are more entity than psycho, but I digress- after all, they were all killers).
I actually liked the Halloween remakes by Rob Zombie, and am hoping for something good to come of a possible remake of IT, even though I have some fondness for the original series (ending aside).
A potential hurdle to face might be the constant emergence of the victims as enabled heroes in modern movies- I see alot of examples of strong protagonist leads fighting back toe to toe and violently defeating the slasher as a sort of twist that has caught on to the point of making some slasher films less horror and more action, which I generally despise. It also takes sympathy out of the equation quickly in alot of cases without examining the true horror that lies in the middle, that these actions, while necessary for survival, are in and of themselves horrific. A good, if rather low-budget, example of addressing that element of horror would be "Almost Human"(2013), wherein a man returns from an abduction to murder former family and friends. At the end there is a point where the protagonist has been pushed too far, and his actions are horrific in and of themselves. Perhaps a better example was "The Mist"(2007), which by the end I felt captured the true horror of the moment. Mind you, this is just my opinion, and not fact- I just happen to like my victims to stay victims. Movies like "the Descent"(2005) and the "Outpost" series of films, while capable of creating tension, don't really satisfy me, as the protagonists are presented as 'too' capable, and clearly outmatch the villains.
Sorry for tangent. This was an excellent article!